Ophthalmic mounting



July .12 I927. v

N. M. BAKER ET AL OPHTHALMIC MOUNTING Filed Oct 25. 1923 INVENTOR FRANK FRASER.

a 4 A NEE. N15 NMB Patented July 12, 1927.

UNITEDSTATES PATENT OFFICE.

NELSON M. BAKER AND FRANK FRASER,'OF. SOUTHBRIDGE, MASSACHUSETTS, AS-

'. SIGNORS T AMERICAN OPTICAL COMPANY, SOUTHBBIDGE, MASSACHUSETTS,

Y AVOLUNTA RY ASSOCIATION OF MASSACHUSETTS. 1

OPHTHALMIC noonrme.

Application filed October 25, 1923 Serial No. 670,678.

The present invention relates to an improved ophthalmic mounting and process'or method of constructing the same, and has particular reference to ophthalmic mounta ings of that class that are formed or chiefly formed from the so-called zyl or other form of cellulose composition.

An important object of our invention is ,to provide an ophthalmic mounting of the :1 character described and a method or process of constructing the same whereby the amount of materials that have heretofore been wasted willnow be saved, thus causing a great saving in time and expense to the manufacturer of such mountings.

Another very important object'of the invention is to provide an ophthalmic mounting of the character described and method or process of forming the same whereby the eye pieces, bridge, and end pieces will be formed separately and then united to form a completed mounting or blank, thus making it possible to make the eye pieces, bridges and end pieces in large quantities and assembling the various pieces with the desired sized other pieces.

Another important object of the invention is to provide an ophthalmic mounting of this nature and process or method of making the no same wherein the eye pieces may be provided with substantial reinforcing means to prevent any warping thereof.

Another important object of the invention is to provide an ophthalmic mounting of this nature and the method or process of forming the same that will be strong, durable, very simple and. inexpensive to manufacture.

Other objects and advantages of the invention will become ap arent during the course of the following escription.

In the drawings, wherein like numerals are employed to designate like parts throughout the same:

Figure 1 is a front elevation of the fin- .ished ophthalmic mounting in an assembled condition.

Figure 2 is a front elevation of a mounting showing the various parts disassociated.

Figure 3 is a transverse vertical section showing the method of forming the eye pieces or tube stock before the tube has been shaped.

1 been shaped. 1

Figure 4 is a similarview showing thembula-r stock shaped.

Figure 5 is a transverse'vertical section showing the tube stock provided with reinforcing means before it has been shaped.

Figure 6 is avview of the same after it has Figure 7 is a fragmentary front elevation of another form of ophthalmic mounting, and

Figure 8 is a section taken on line 8-S thereof.

In the drawings, wherein for the purpose verly set up, after which it may be cut so as to form an eye piece, as is designated by the numeral. 12. This eye piece 12 will have the desired groove or lens seat and will at the same time have the proper curvature as at 13, thus doing away with a great deal of milling that has heretofore been required.

The ends may be cemented as at 14, and it has been found through experimentation that such cemented -joints are practically every bit as strong as a ring stamped from sheet stock.

In Figure 5 the tube 10 has a substantially U-shaped metallic member 15 placed within its bore, said member being thin enough and pliable enough to be curved, although in ordinary practice it will be found to be rigid. A roller 16 having the somewhat pointed end 17 is rolled along the tube, whereby the tube will assume a position as shown in Fig ure 6, thus forming a lens seat 18 similar to the seat 19 in Figure 4, except that it is angular instead of round. The tube stock as is shown in Figure 6, is shaped and cut as shown in Figure 4, thus forming an eye piece 12 which may or may not be reinforced by the metallic member 15, as may be desired for the particular purposes for which it is used. After the rings 12 have been formed the bridges and end pieces 21 may be formed and suitable sized ones are selected and cemented to the eye pieces.

It is preferred that the joint, as at 14, will be arranged so that the end piece 21 will overlie both ends thereof so as to give additional strength to the finished product. The bridge 20 will be cemented as at 22 while the end pieces will be cemented as at 23. Of course, various methods may be employed and devised to insure perfect alignment of the bridge and end pieces with respect to the eye pieces, so that we do not wish to limit ourselves to any one particular method. It will be seen that asmall or large bridge 20 may be used with the eye pieces so that any combinations may be had by such a construction. The metallic reinforcing member 15 will be found exceptionally desirable in the so-called all zyl frames, as this member will prevent warping of the frame and will thereby increase the life thereof.

In Figure 7 the ring 2% is placed over a metallic frame 25, as is shown in Figure 8,

thus the ends 26 will not be cemented to each other, as at 14, but will be secured in the usual manner. In this instance it will not be necessary or desirable in most cases to provide the reinforcing element 15, but

the ring as formed by the method shown in Figures 3 and 4 will be placed over the metallic ring 25.

By forming an ophthalmic mounting in this manner considerable stock is saved, and as the composition used is a very expensive one, such an item is very important. Furthermore, the time involved will be greatly reduced as a number of the milling and gmoving operations will be obviated, and the rings will be formed from tube stock in one or two operations.

It is to be understood that the form of our invention herewith shown and described is to be taken as the preferred embodiment of the same and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the inventon or the scope of the sub-joined claims.

Having thus described our invention, we claim:

1. An ophthalmic mounting of the character described comprising eye pieces formed from rolled tube stock, said stock being cemented at its end, a bridge cemented between said rings and end pieces cemented to said rings at the point where the said tube stock has been cemented.

.2. In a device of the character described, a pair of lens rims having an outer layer of substantially sen'li-circular cross section and an inner layer parallel with the outer layer, both layers being one continuous piece, and a bridge member cemented to-each of the lens rims to connect the same.

In a device of the character described, a pair of non-metallic lens rims having an outer layer of substantially semi-circular cross section and an inner layer parallel with the outer layer, both layers being one continuous piece, a metallic member parallel with the two layers and lying therebetween, and a bridge member cemented to each of the lens rims to connect the same.

NELSON M. BAKER. FRANK FRASER. 

